Cutting tool



G. F. AKRIEGER.

CUTTING TOOL.

APPLlcAT|oN F|LEn ocT,26,192o.

y 1,408,358. Patented Feb. 28, 1922.

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Grenen F. Kamerun, or WISCONSIN RAPIDS, wisconsin.

CUTTING roofI..

To'aZ'Z wiz/'omitmag/concern: l

Beit known that I, Groen F. KRIEGER, a citizen of the' United States,residing at Wiscousin Rapids, in the county of'VVood" and State ofWisconsin, have invented certain new and' useful` Improvementsl inlCutting the-above' class which may be readily secured in a lathe orsimilar-"stationary tool support and means to adjust thesame withaccuracy and precision to cut and plane the irregu'. lar-itieso-f lcrankpins Vor shafts.

Another object of the invention resides in an adjustable cutter fortruing and turning crank pins or shafts including a micrometer screw'for adjusting the cutting knife according to a predetermined gage.

With these objects in View and others which will be manifest andsuggested as the nature and purpose of my invention are revealed in thefollowing specification and drawing wherein I have shown a practical,yet preferred embodiment thereof.

Figure 1 is a front elevation, partly in section showing the micrometeradjusting screw.

F'Fig'. 2 is a view taken on the line 2--2 of Fig. 3 is a perspectiveview of the cutting knife.

Referring now to the drawing wherein similar numerals designate the sameparts in the specification, the cutting tool consists of a stationaryjaw 1 and movable upper jaw 2. which is substantially V-shaped andprovided with apertured flanges 3, f1 resting on the correspondingapertured anges 5,'6 of the lowel` jaw 1. The flange 6 terminates in ascrew threaded boss 7 which is securely retained in a stationary supportsuch as a lathe (not shown) and immovably retains the tool in position.

Vertical, screw threaded bolts 8, 9 permanently secured in the flangesof the lower jaw pass through the apertured Hanges 3, L1 and receivescrew threaded elements 10, 11 whereby a crank pin or shaft 12 may bere- Specicaton of Letters'latent.

Patented Feb'.` 238,l

Application med october as, 192e.v serial No. 419,683.

tained in the'recess y13 betweenthe upper and lower jaws as is clearlyshown in Fig.k 1 of the drawing. Y u

The upper jaw 2 is preferably cut out as shown at' 14 to receive atransverse, curved bearing member 15, an* enlarged curved transversebearing member 16 being' also permanently secured' to the underside ofthe` upper jaw. It will be understood that the up .per jaw may bereversed if sode'sired to' ac -commodate the size of crank 4 pi-ny orshaft which Ais to be planed. f

The stationary jaw is shown,V preferably rounded as at 17 and' isprovided with a threaded aperture 18 for the r'eception ofa micrometerscrew and graduated knurled turning member j 20. kA vertical transversegroove or recess 21 inthe lower jaw slidably receivesL therein thecutting knife'22 .madeof high tempered steel. Communicating with thesaid recess 21 are provided two vertical apertures 23, 24 in which areslidable rods 25, 26 adapted to contact with the said knife as clearlyshown in Fig. 2 of the drawing. A flat connecting member 27 joins thelower extremities of the slidable rods and normally lies on themicrometer screw 20. It will become immediately apparent that as themicrometer screw is turned it will raise the slidable pins andconsequently the cutting knife. In order to retain the knife in itsstationary cutting position when it has been adjusted to its properheight, I have provided a threaded aperture 28 vat right angles Vto andcommunicating with the recess 21, wherein a set screw 29 bears againstthe knife as shown.A The transverse groove 30 is provided adjacent theknife to receive the scraps of metal as is obvious.

In the operation of the device, the crank pin or part to be cut is firstplaced between the respective jaws and the elements 10, 11 are tightenedand retain the part in position between the bearing portion 16 and thelower jaw. The micrometer screw is turned thereby raising the slidablerods bearing against the cutting knife 22 untilY it is raised in contactwith the part to be planed. The set screw 28 is then turned and keepsthe cutting knife in position and when it is desiredto further raise thesame, the set screw is loosened and of course the micrometer screw isturned the proper distance.

In the accompanying drawing, I have illustrated my invention embodiedinone shafts and the like, comprising a stationary .i

form by -way of example, and which in practice has been found to behighly satisfactory in obtaining the desired results. It will be obvioushowever that other embodiments may be adopted, and that various changersin the details of construction may be resorted to by those skilled inthe art without departing from the spirit and scope of the invention. Itis furthermore understood that the invention is not necessarily limitedor restricted to the precise elements shown except in so far as suchlimitations are specified in the subject matter being claimed.

What I claim is: i l. A tool for truing crank pins, crank jaw, almovable, reversible jaw, means for adjustingsaid movable jaw, a cuttingknife carried by the stationary jaw, meansfor securing said knife, amicrometer screw and separable means movabletherewith for engagingsaid-knife to move the same to its adjusted position.Y j Y 2. A tool fortruing crank pins, `crank shaftsand the like, comprising a stationaryjaw, a movable, reversible-jaw, means for adjusting said movable jaw, ,acutting knife vertically movable within a transverse groove in thestationary jaw, means for securing said knife, a micrometer screwthreadhereto.

ed withinr the stationary jaw and slidable means` movable with saidscrew for engagin said knife to move the same to its adjuste position.

3. A tool for truing crank pins, crank shafts and the like, comprising astationary jaw, vertical screw threaded bolts carried thereby, amovable, reversible jaw adjustable on said bolts, bearing elementsformed on said reversible jaw, acutting knife vertically movable withinthe stationary jaw, means for securing said knife, slidable rods-,con-

tacting with said knife and a micrometer screw for raising or loweringsaid rods and knife. c c

4. A tool` for truing crank pins,`crank shafts and the like, comprisinga stationary jaw, screw threaded bolts carried thereby, a verticallymovable, reversible and adjustable jaw carried by said bolts, curvedbearing elements formed onsaid movable jaw, a transverse knifevertically movable within the recess in said stationary jaw, a set screwfor securing said knife, a pair of slidable connected rods contactingwith said knife and a micrometer screw for' raisingor lowering saidconnected rods and knife.

In testimony whereof Iaiiix my signature i .GEORGE F. KRIEGER.

